John m



(No Model.)

J. M. SPRING.

BRACKET.

No. 248,675. I Patentedflct. 25,1881.

NITED STATES PATENT ()FFICE.

JOHN M. SPRING, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO P. 85 F. CORBIN, OF SAME PLACE.

B RACKET.

SPECIFICATION forming part of Letters Patent No. 248,675, dated October 25, 1881.

Application filed July 9, 1881. (No model.)

To all whom it may concern Be it known that I, JOHN M. SPRING, of New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Brackets, of

which the following is a specification.

My invention relates to improvements in brackets in which the arm is made separate from,but attachable to, the back and brace by means of a groove in the arm and dovetailed connections, which can be disengaged only by slipping the arm endwise, so as to project it in rear of the back; and the objects of my invention are to make a cheap connection of the [5 arm with the back and brace that cannot become detached when the bracket is put up, and which, except from the finish of the brace, will have substantially the same appearance as it the arm were formed integral therewith. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure I is a plan view; Fig. 2, a side elevation of the back and brace, with a vertical section of the arm, on line new of Fig. 1. Fig.

2 3 is a rear elevation. Fig.4 is a vertical section on line 2 z of Fig. 1, and Fig. 5 is a vertical section of the arm on line 3 y of Fig. 1.

A designates the back, B the brace, and C the arm which is designed to receive the shelf 0 or other object which it may be used to support.

The back A is made short at its upper end, so as not to extend up quite so high as the brace 13, and the arm 0 is provided with a 5 groove, to, to receive the upper edge of the brace B.

The brace B has two upwardly-projecting lugs, b b, of dovetail form-that is, widest at the upper and outer ends-and they are also tapered so as to be the widest at the end which is farthest from the back.

The arm C has two openings. The narrowest part of said openings is at the end which is nearest the back 0 0, corresponding in form to the lugs b 1), except that they are longer in the direction of the length of said arm.

The parts are assembled by putting the arm C on the brace, with the upper edge of said brace resting in the groove a, and with the 0 lugs b in the widest part of the openings 0 c that is, the end of said openings which is farthest from the back-in which position the end of the arm C will project to the rear of the back, as indicated by broken lines in Fig.

2. The arm is then driven or forced forward into the position represented in the drawings, when the dovetailed form of the lugs and openings will bind the arm firmly to the brace. Sosoon as the back is secured against a wall or other object the arm cannot slip backward 6o endwise, and therefore can never become accidentally detached. The grooved arm which embraces the upper end of the brace conceals the seam and gives substantially the appearance of an. arm formed integral with said brace.

The advantages of making an arm of a separate and attachable piece are not peculiar to my invention, but are common to all brackets of that class, the same being old and well known.

A prior patent showsa bracketin which the upper edge of the brace projects above the back, and is provided with a hook and a dovetailed lug for engaging a grooved arm having corresponding openings; but the openings in the arm were widest instead ofnarrowest at the end nearest the back,and consequentlythe grooved arm was necessarily provided with hooks for taking over the back and prevent- 8o ing said arm from working forward to disengage the dovetails. Such brackets are hereby disclaimed.

I claim as my invention- The back and brace formed with the upper edge of the brace extending above the upper end of the back, and provided with dovetailed lugs on said upper edge, in combination with the grooved arm having the narrowest part of the elongated dovetailed slots at the end of 0 said slots which is nearest the back, the Whole adapted forputting together by tirstplacing the grooved arm on the brace, with its inner end projecting in the rear of the back, and then crowding it endwise to bring said end flush with the back, substantially as described, and

for the purpose specified.

' JOHN SPRING.

Witnesses:

E. L. PRIOR, CHAS. PEcK. 

